本文選題：形變儀器　切入點：檢測裝置　出處：《中國地震局地震研究所》2013年碩士論文　論文類型：學(xué)位論文

【摘要】：地形變測量是研究地殼形變及其固體潮的一種重要手段，它對地球動力學(xué)研究和地震前兆觀測都具有重要意義。 本文主要設(shè)計了伸縮儀和水管儀檢測裝置，用于檢測形變儀器的輸入輸出信號。檢測裝置測試的目的就是為了確定形變儀器的靈敏度和傳遞函數(shù)關(guān)鍵指標(biāo)，既為地殼形變觀測方法標(biāo)準(zhǔn)制定提供依據(jù)，也為形變儀器測試技術(shù)研究開拓道路。 實驗過程中，對地殼形變儀器中的伸縮儀和水管儀實驗數(shù)據(jù)進(jìn)行數(shù)據(jù)處理與分析。在系統(tǒng)辨識數(shù)據(jù)處理時提出一種更高精度的辨識方法，并與傳統(tǒng)辨識方法比較，分析了誤差。 獲得儀器系統(tǒng)傳遞函數(shù)后，本文對儀器的幅相特性進(jìn)行了分析，得出儀器系統(tǒng)通頻帶及過渡帶的頻帶范圍，為儀器采樣率的確定提供理論依據(jù)。 在儀器頻帶范圍內(nèi)選取了二十四個頻率點信號，進(jìn)行地動信號的模擬仿真，得出其原始信號圖及功率譜圖。然后對原始信號源數(shù)據(jù)通過不同采樣率進(jìn)行采樣，，對采樣數(shù)據(jù)進(jìn)行功率譜分析。利用功率譜，分析了引起“假頻”信號的原因，并且確定采樣結(jié)果中“假頻”信號的頻率。 由于本文所設(shè)計的檢測裝置不能夠提供正弦信號標(biāo)定，因此本文對地殼形變儀器的測試與實驗主要在時域上進(jìn)行研究。對于地殼形變儀器頻域上的研究工作，將是未來研究的重點。
[Abstract]:Earth deformation measurement is an important means to study crustal deformation and solid tide. It is of great significance for geodynamics research and earthquake precursor observation. In this paper, we mainly design the measuring device of telescopic instrument and water pipe instrument, which is used to detect the input and output signal of deformation instrument. The purpose of testing device is to determine the sensitivity and key index of transfer function of deformation instrument. It not only provides the basis for establishing the standard of crustal deformation observation method, but also opens the way for the research of deformation instrument testing technology. In the course of experiment, the experimental data of extensometer and plumbing instrument in crustal deformation instrument are processed and analyzed. A more accurate identification method is proposed in the process of system identification data processing, and compared with the traditional identification method. The error is analyzed. After obtaining the transfer function of the instrument system, the amplitude and phase characteristics of the instrument are analyzed in this paper, and the frequency band range of the pass band and the transition band of the instrument system is obtained, which provides the theoretical basis for the determination of the sampling rate of the instrument. Twenty-four frequency point signals are selected in the frequency band of the instrument to simulate the ground motion signal, and the original signal diagram and power spectrum diagram are obtained. Then the original signal source data are sampled at different sampling rates. This paper analyzes the power spectrum of the sampled data, analyzes the causes of the "false frequency" signal, and determines the frequency of the "false frequency" signal in the sampling result. Because the detection device designed in this paper can not provide sinusoidal signal calibration, the testing and experiment of crustal deformation instruments are mainly studied in time domain. Will be the focus of future research.
【學(xué)位授予單位】：中國地震局地震研究所
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2013
【分類號】：P227

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